Pulverizer



Spt. 5, 1933. G. H. KAEMMERLING 1-92506 PULVERI ZER Filed sept, 2, 1930 f ATTORNEYS.

Patented Sept. 5, 1933 PULVERIZER- j Gustav 'Kaemmerlingg Erie, Pa.,`assignor to Erie City Iron Works, Erie, Pa., a corporation of Pennsylvania Application september 2, 1990. seri'aiNo. 479,359

Y 6.A Claims.

The present invention is directed tothe irnprovement of themounting and constructionof revolving paddles used in pulverizers. It is desirable that the paddles be of simple construction and capable of opposing the 'shock and centrifugal force and of such geometrical form that they may be either cast or forged and require no machining in order to put them in use, thereby permitting the use of chilled iron, alloy steel, or any other material of which the resistance to wear is such as to make it not readily machineable.

It is also desirable to pivotally mount such paddles so that they may yield under abnormal shocks and Without injuring the operating parts.

It is also desirable to house the operating parts by the material of the paddle so that materials readily machined and of ordinary hardness may be used for the mounting, the wear being confined in a large measure to the paddle itself.

It is also desirable to form such paddles and mounting therefor insuch manner that they may be readily removed so that substitutions of paddles may be made as they become worn.

In general the present application is an improvement on my former invention disclosed in application Serial Number 395,545, filed Sept. 27th, 1929.- y

Features and details of the invention will appear from the speciicationl and claims.

A preferred embodiment ofv the invention is illustrated in the accompanying drawing as followst- Fig. 1 shows a side elevation of a -pulverizer partly broken away to show construction.

Fig. 2 a section of a pulverizer disc `with the I paddle in place on the line 2-2 in Fig. 4.

Fig. 3 a perspective View of they key for locking the paddle in place, the paddle being indicated in dash lines.

Fig. 4 a section on the line 4 4 in Fig. 2, the disc being broken away to better show the construction of the paddle.

Fig. 5 a side elevation of the key.

' Fig. 6 a front elevation of the key.

Fig. 7 a section on the line 7--7 in Fig. 2.

1 marks the base of the pulverizer, and 2 the pulverizer case. This has the usual shaft 3 rotatively driven by the usual mechanism (not shown).l The case is divided into pulverizer chambers 4 divided by diaphragms 5, the diaphragms having openings 6 for the movement` of the pulverized material through the pulverizer. Discs 7 are xed on the shaft. Trunnion pins 8 are secured in the discs and pulver- (o1. sap-11) izing paddles 9 are secured on these trunnions. Each paddle 9 has a slot 10 into which a supporting disc 7 extends. The side walls of thisv slot are provided with grooves 11" forming hooks 11a adapted to engage the trunnion 8. `The upper wall or" the slot 10 is inclined tothe face of the paddle so as to give the clearance to permit 'the paddle to 'swing back when subjected to abnormal shock. This inclination of the wall l2 is also useful in permitting the paddle to swing back when it is assembled in place. The engaging walls 13 of the hooks 11a are parallel with the wall 12 and the periphery of the disc is preferably flattened at 14 so that by inclining the paddle so as to bring the wall 12 into contact with the flattened portion 14 the paddle may be moved along the flattened portion carrying the hook under the trunnions 8 so as to secure the paddle in place.

In order to lock the paddle against accidental removal keys are provided locking the trunnions in place in the hooks. To this end the hooks are provided with openings, which, in the preferred form, are slots 15 extending from the inner facesof the hooks. Keys lhaving the outwardly bent head 17 are slid into the slots 15. The ends of the keys are forked, one fork 18 extending upwardly into position directly back of the trunnions and the other Afork of the key being bent down on the engaging wall of the hook. Thus the keys are locked in the groove against lateral movement by the disc and against endWise movement by the shoulders formed by the head 15 and the down-turned fork 18. It is preferable to provide a key at each side of the disc and vin the present construction two keys are shown. This provides a simple, rugged and efficient structure for locking the paddles in place and provides a key which with any simple implement, or tool may be readily removed so as to permit the removal of the paddles. Thus substitutions of the paddles may be conveniently made.

What I claim as new is:-

1. In a pulverizer, the combination of a rotating carrier plate; trunnions projecting from the plate; a paddle having a slot receiving the car- 'rier plate, the sides of the slot having hooks formed therein engaging the trunnions, a hook having an opening therethrough; and a key extending through the opening into the space back of the trunnions to lock the hook on the trunnions. l

2. In a pulverizer, the combination of a rotating carrier plate; trunnions projecting from the plate; a paddle having a slot receiving the carrier plate, the sides of the slot having hooks formed therein engaging the trunnions, said hooks having openings therethrough; and keys extending through the openings into the space back of the trunnions to lock the hooks on the trunnions.

3. In a pulverizer, the combination of a rotating carrier plate; trunnions projecting from the plate; a'paddle having a slot receiving the carrier plate, the sides of the slot having hooks formed therein engaging the trunnions, a hook having an opening therethrough; and a key extending through the opening into the space back of the trunnions to lock the hookon the trunnions, the key comprising a head and a forked end, one fork being bent to lock the key in the opening.

4. In a pulverizer, the combination of a rotating carrier plate; trunnions projecting vfrom the plate; a paddle having a slot receiving the carriei` plate, the sides of the slot having hooks formed therein engaging the trunnions, said hooks having openings therethrough; and keys extendingl through the openings into the space back of the trunnions to lock the hooks on the trunnions, the keys comprising heads'and forked Y'back of the trunnions to lock the hook ends, one fork of each key being bent to lock the key in the opening.

5. In a pulverizer, the combination of a rotating carrier plate; trunnions projecting from the plate; a paddle having a slot receiving the carrier plate, the sides of the slots having hooks formed therein engagingA the trunnions, a hook having an opening therethrough in the form of a groove across the inside of the hook; and a key extending through the groove into the space on the trunnions. v

6. In a pulverizer, the combination of a rotat- A ing carrier plate; trunnions projecting from the plate; a paddle having a slot receiving the carrier plate, Vthe sides of the slots having hooks formed therein engaging the trunnions, a hook having an opening therethrough in the form of a groove across the inside of the hook; and. a key extending through the groove into the space back of the trunnions to lock the hook on the trunnions, the key having shoulders` and being locked laterally in the' groove by `the* plate and endwise in the groove by the shoulders o n the key.

GUSTA'V H. KAEMMERLING. 

